The Release Train Engineer (RTE) is a servant leader and coach for the Agile Release Train (ART). The RTE’s major responsibilities are to facilitate the ART events and processes and assist the teams in delivering value. RTEs communicate with stakeholders, escalate impediments, help manage risk, and drive relentless improvement. The Solution Train Engineer (STE) plays an equivalent role in a Solution Train, facilitating and guiding the work of all ARTs and Suppliers in the Value Stream. Although ARTs and Solution Trains are composed of self-organizing and self-managing teams, trains don’t drive or steer themselves on autopilot. That responsibility falls to the RTE or STE, who operate most effectively as servant leaders. They have a solid grasp of how to scale Lean and Agile practices and understand the unique opportunities and challenges associated with facilitating and continuously aligning a large development program.